Screw-plug flush receptacle



SCREW PLUG FLUSH RECEPTACLE Filed June 21. 1920 Patented July 1, 1924.

UNITED STATES PATENT OFFICE.

IRA SELTZER, OI WATERBURY, CONNECTICUT, ASSIGNOR TO THE GORDON momma MG. (30., OF WATEBVILLE, CONNECTICUT, A CORPORATION.

SCREW-PLUG FLUSH RECEPTACLE.

Application filed June 21, 1920. Serial No. 890,895.

To all whom it may concern:

Be it known that I, IRA R. SELTZE'R, a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Screw-Plug Flush Receptacles; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in

Fig. 1, a view in vertical section showing one embodiment of my improved screw-plug flush receptacle, as installed.

Fig. 2, a detached view in front elevation of the receptacle as mounted upon a loombox with the receptacle-plate removed.

Fig. 3, a detached perspective view of the mounting-bridge.

Fig. 4, a detached view .in side elevation of the receptacle-base.

Fig. 5, a detached plan view thereof.

Fig. 6, a corresponding reverse plan view thereof.

Fig. 7, a detached view thereof in vertical section on the line 7-7 of Fig. 5.

Fig. 8, a corresponding view on the line 8-8 of Fig. 5.

Fig. 9, a broken detail view showing the receptacle-plate and bridge in central transverse section, with the base in elevation.

My invention relates to an improved screw-plug flush receptacle, the object being to produce a simple, compact and con venient article of the character described, constructed with particular reference to safety and facility of wiring and installin it.

ith these ends in view my invention consists in a screw-plug flush receptacle characterized by having a receptacle-base receiving a screw-shell, provided at its inner end with binding terminals, suspended in a mounting-bridge and adapted at its forward end to extend between the bridge and the receptacle-plate, whereby it is held in place against endwise movement.

My invention further consists in a screwplug flush receptacle having certain details of construction as will be hereinafter describedand pointed out in the claims.

In carrying out my invention, as herein shown, I employ a relatively small receptaceive and insulate.

ole-base 9 made of porcelain or other suitable insulating material and not eatly exceeding in size the size of the s eet-metal screw-shell 10 which it is designed to re- As shown, the base is cylindrical in form, but I do not limit myself to any specific shape. Its outer end is entered by a circular chamber 11 for the reception of the screw-shell aforesaid, while its inner end is formed, as shown, with oppositely located assembling-recesses 12 and 13, with a center-contact recess 14 and a shell-contact recess 15.

Such a base as described, is suspended, as 1t were, in a sheet-metal mounting-bridge 16 having a relatively large, centrally arranged mounting-opening 17 through which the base is passed from front to rear, the base and opening being adapted in crosssectional form to prevent the former from rotating in the latter. As shown, this end is accomplished by forming the opening 17 with straight side-walls 18 and flattening the opposite faces of the base, as at 19. For holding the base against endwise movement in the mounting-bridge, it is provided at its outer end with two suspension-flanges 20 which overhang the flattened sides 18 of the opening 17 in the bridge 16 and are clamped between the same and the receptacle-plate 21, as shown in Fig. 9.

The ends of the mounting-bridge 16 are formed with transversely elongated screwholcs 22 for the reception of screws 23 by means of which the bridge is fastened to threaded and perforated lugs 24 turned outwardly at right angles from the ends of the loom-box 25 which may be of any approved construction and which, as herein shown, is provided with angle-plates 26 by means of which the box is itself secured in place within a recess 27 formed in the wall 28 in which the device is installed. The loom-box proper, however, forms no part of my invention.

The mounting-bridge 16 is also formed on opposite sides of its opening 17 with threaded screw-holes 29 for the reception of the screws 30 by means of which the receptacleplate 21 is secured to the bridge with its inner face bearing upon the outer faces of the flanges 20 thereof, as described.

The receptacle-plate 21 is formed with the usual service-opening 31 centered with respect to the screw-shell 10 and closed when not in use, by means of a disk-shaped door 32 formed at its upper end with a hinge 33 and at its lower end with a stop 34, the outer end of the base being formed with a cut 35 for the clearance of the hinge and with a cut 36 for the clearance of the stop.

The shell 10 is secured in place within the base by means of a screw 37 (Fig. 2), passing through a sector 38 forming a part of the bottom of the shell, the said screw serving to secure in place the shell-terminal 39 located within the recess 15 in the inner face of the base. The terminal 39 carries the binding-screw 40 to which the shellterminal wire 41 is attached. The centercontact 42, as shown, though not necessarily, consists of a rivet located in the center of the inner end of the base and mountin the center-terminal 43, which is located wlthin the center-terminal recess 14 and carries a binding-screw 44 for the attachment of the center-contact wire 45. The center-contact may be a rivet, as shown, or an ordinary machine-screw.

In addition to being secured in place by the screw 37 as described, the shell is secured in place by means of integral assembly-arms 46 formed upon its inner edge and entering the recesses 12 and 13 in theinner face of the base through passages 47 leading out of the inner edge of the chamber 11, as shown in Fig. 8, the bottoms of the recesses 12 and 13 preferably being undercut to permit the assembling arms 46 to be bent at an acute angle for greater holding-power.

Under my improved construction, the receptacle-base is greatly reduced in size over the receptacle-bases of the prior art, insomuch as those bases have generally been elongated for the attachment to their outer faces of metal brackets by means of which they have been suspended in loom-boxes and for the reception of the centerand shellcontact terminals, thus brought to the outer face of the base where they have been ex posed not only to derangement, but also to dangerous personal contact.

Under my construction, by reducing the size of the receptacle-base to practically the size required to insulate the screw-shell, I greatly enlarge the available space within the loom-box, whereby I secure superior convenience in installing the receptacle, particularly in wiring. Under my construction, also, the terminals are located to the rear of the base, whereby the wiring is located where the greatestmeasure of safety is secured. Also, by virtually enlarging the free space within the loom-box, I secure ample space for the service wires, in case they are left too long at] the time of wiring the building.

I claim:

1. The combination with a mountingbridgehaving an opening, of a rceeptacleplate located in front of the said bridge in spaced relation thereto, and a receptaclebase installed in the said opening of the bridge and adapted at its forward end to extend laterally into the s ace between the bridge and plate, whereby it is held against endwise displacement.

2. The combination with a mountingbridge having an openin of a receptacleplate locatedin front of t e same in spaced relation thereto, a receptacle-base installed in the said openin and having its forward end laterally exten ed into the space between the bridge and plate, and means for drawing the bridge and plate together, to grip the lateral extension of the base between them, wherebythe' same is firmly held in place.

3. The combination with a mountingbridge having an opening, of a receptacleplate located in front of the same in spaced relation thereto, and a receptacle-base mounted in the said opening and adapted at its forward end to extend into the space between the said bridge and plate to prevent the endwise movement of the base with respect to the bridge and plate, and the base and the opening in the bridge being shaped to pre vent the former from turning in the said opening.

4. The combination with a mountingbridge having an oblong opening, of a receptacle-plate located in front of the said opening in spaced relation thereto, and a receptacle-base located in the said opening and conforming thereto in shape to prevent its rotation therein, and the forward end of the base being laterally extended into the space between the bridge and plate, whereby the base is held against endwise displacement.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

IRA R. SELTZER. Witnesses:

MARY G. WIoKmM, I On P081. 

